ABAP Select data from SAP table RKCT299 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKCT299 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RKCT299. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RKCT299 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RKCT299 TYPE STANDARD TABLE OF RKCT299,
      WA_RKCT299 TYPE RKCT299,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RKCT299> TYPE RKCT299.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKCT299.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKCT299
  INTO TABLE IT_RKCT299.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKCT299
*  INTO TABLE @DATA(IT_RKCT2992).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RKCT299 INDEX 1 INTO DATA(WA_RKCT2992).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKCT299 ASSIGNING <RKCT299>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKCT299>-AEMENGE = 1.
<RKCT299>-AENETWR = 1.
<RKCT299>-BASME = 1.
<RKCT299>-GUMENGE = 1.
<RKCT299>-GUNETWR = 1.

ENDLOOP.

LOOP AT IT_RKCT299 INTO WA_RKCT299.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKCT299-KUNNR, sy-vline,
  WA_RKCT299-MATNR, sy-vline,
  WA_RKCT299-OAUME, sy-vline,
  WA_RKCT299-OAUWE, sy-vline,
  WA_RKCT299-REMENGE, sy-vline,
  WA_RKCT299-RENETWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKCT299 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RKCT299 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RKCT299 INTO WA_RKCT299.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RKCT299_STR, 
AEMENGE TYPE STRING,
AENETWR TYPE STRING,
BASME TYPE STRING,
GUMENGE TYPE STRING,
GUNETWR TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
OAUME TYPE STRING,
OAUWE TYPE STRING,
REMENGE TYPE STRING,
RENETWR TYPE STRING,
SPART TYPE STRING,
SPBUP TYPE STRING,
STWAE TYPE STRING,
UMMENGE TYPE STRING,
UMNETWR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKCT299_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RKCT299_STR-AEMENGE sy-vline 
WA_RKCT299_STR-AENETWR sy-vline 
WA_RKCT299_STR-BASME sy-vline 
WA_RKCT299_STR-GUMENGE sy-vline 
WA_RKCT299_STR-GUNETWR sy-vline 
WA_RKCT299_STR-KUNNR sy-vline 
WA_RKCT299_STR-MATNR sy-vline 
WA_RKCT299_STR-OAUME sy-vline 
WA_RKCT299_STR-OAUWE sy-vline 
WA_RKCT299_STR-REMENGE sy-vline 
WA_RKCT299_STR-RENETWR sy-vline 
WA_RKCT299_STR-SPART sy-vline 
WA_RKCT299_STR-SPBUP sy-vline 
WA_RKCT299_STR-STWAE sy-vline 
WA_RKCT299_STR-UMMENGE sy-vline 
WA_RKCT299_STR-UMNETWR sy-vline 
WA_RKCT299_STR-VKORG sy-vline 
WA_RKCT299_STR-VTWEG sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.